Tommy Haas of Germany's girlfriend Sara Foster reacts as she watches his Men's Singles quarter final match against Novak Djokovic of Serbia on day eleven of the French Open at Roland Garros on June 5, 2013 in Paris, France. (Photo: Getty Images)

Jelena Ristic, girlfriend of Serbia's player Novak Djokovic attends a French tennis Open quarter final match between Serbia's Novak Djokovic and Germany's Tommy Haas at the Roland Garros stadium in Paris on June 5, 2013. (Photo: AFP/Getty Images)

Novak Djokovic of Serbia's girlfriend Jelena Ristic watches his Men's Singles quarter final match against Tommy Haas of Germany on day eleven of the French Open at Roland Garros on June 5, 2013 in Paris, France. (Photo: Getty Images)

Tommy Haas of Germany's girlfriend Sara Foster reacts as she watches his Men's Singles quarter final match against Novak Djokovic of Serbia on day eleven of the French Open at Roland Garros on June 5, 2013 in Paris, France. (Photo: Getty Images)

Novak Djokovic of Serbia's girlfriend Jelena Ristic smiles as she watches his Men's Singles match against Grigor Dimitrov of Bulgaria on day seven of the French Open at Roland Garros on June 1, 2013 in Paris, France. (Photo: Getty Images)

Redfoo (R), also known as Stefan Gordy of the band LMFAO, watches as his girlfriend Victoria Azarenka of Belarus plays Alize Cornet of France in their women's singles match during the French Open tennis tournament at the Roland Garros stadium in Paris June 1, 2013. (Photo: Reuters)

Novak Djokovic of Serbia's girlfriend Jelena Ristic and physiotherapist Milan Amanovic (R) watch his Men's Singles match against Guido Pella of Argentina during day five of the French Open at Roland Garros on May 30, 2013 in Paris, France. (Photo: Getty Images)

Tommy Haas' Girlfriend Sara Foster

Tommy Haas of Germany's girlfriend Sara Foster reacts as she watches his Men's Singles quarter final match against Novak Djokovic of Serbia on day eleven of the French Open at Roland Garros on June 5, 2013 in Paris, France. (Photo: Getty Images)